Sintering apparatus



Jan. 9, 1923. 1,442,023.

L. C. EDGAR.

SINTERNG APPARATUS.

FILED fia. x7. 1921. 2 SHEETS-SHEET s.

l lain l'zevses.- nwenfor.-

Jan. 9, 1923.

L. C. EDGAR.

SINTERING APPARATUS.

2 SHEETS-SHEET 2.

FILED FEB. l?. i921.

Wimases.-

Patented Jan. 9, 1923.

UNITED= STATES PATENT OFFICE.

f LOUIS C. EDGAR, OF SWISSVALE, PENNSYLVANIA.

SINTERING APPARATUS.

Application led February 17, 1921. ,Serial No. 445,631.

To all whom t may concern:

Be it known that I, Louis C. EDGAR, aV

citizen of the United States, and resident of Swissvale, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Sintering` Apparatus, oi' which the following is a specification.

This invention relates to apparatus used in sintering flue dust, and similarly finely divided metal bearing materials, and more particularly to down-draft sintering apparatus operated by induced draft.

The primary' object of this invention is the provision of sintering apparatus having;1 novel means whereby the exhaust gases or products of combustion are cleaned and cooled.

Another object of the invention is to provide a sintering plant havinplr novel `means for effectively removingn finely divided solids from the gaseous products of combustion, before such gaseous products reach the exhaust face of the apparatus.

A further object of this invention is to provide novel means whereby finely divided solids are removed from. and the te1nperature of the gases is materially lowered in the passage thereof through suitable wash ers, before they enter the exhaust fan.

A still further object of the invention is to provide novel means for removing the sludge and water from the washed gases hefore the passage of the gases through the exhaust fan, forming part of my improved apparatus.

A further object of the invention is to provide a sintering apparatus having the novel constructions, arrangements and combination of parts shown in the drawings, to be described in detail hereinafter, and to be specifically pointed out in the appended claims. A

In sintering plants using an induced draft, of the constructions heretofore used,

the sintering bed or pan is connected to an.

exhaust fan by suitable flues or piping, and an exhaust stack. The vflue dust or other material to be sintered, in a finely divided state` is placed in the sintering pan. Ordinarily the grate bars forming the perfof rated bottom of the sintering pan are cov-V ered With a layer of refractory 1naterial,.in the form of lumps, which forms a porous hearth Within the sinterin the materiel to be sinteredg pan, upon which Y 1S Supported, and

through which the burned gases are drawn by the exhaust fan in the sintering apparatus.

The upper surface of the material is leveled, and a gas burning igniter is wheeled into position above the bed of material in thc sintering pan. The exhaust fan is then started, and when in operation, withdraws the products of combustion from the pan, and causes currents of air to pass through the bed of `material being sintered.` in quantities sufficient to support vcombustion and sinter the material. After the upper surface of the material Within the pan becomes thoroughly ignited. the igniter is moved away. The exhaust fan continues to Withdraw the products of combustion from the pan, sufficient air passing through the materials in the pan to gra-dually propagate the sinteringoperation downwardly through the mass or body of material in the pan or paus. and progressively burn the material into a sintering mass.

The burned gases or products of conduistion. as drawn from the material b v the exhaust fan are necessarily more or less heavily laden with fine particles of the material beingV sintered, and also are at a very high temperature, these factors causing the exhaust yfan to become damaged quickly. and require frequent and expensive repairs, as Well as costly interruptions in the operation of the shitorinpj apparatus.

Referring now to`the drawings, forming part of this specification, Figure l is a dia grammatic. vside elevation showing a sintering plant embodyingthe novel features of my invention.

Figure 2 is a diagrammatic end elevation of the apparatus of Figure l.

Figure 3 is an enlarged sectional elevation through one of the gas Washers forming' part of my improved apparatus.

Figure 4 is a transverse sectional view on the line IV-IV of Figure showing detailsin theconstruction of the gas Washers of Figure 3.

In the accompanying drawings, the numeral 2 designates the sintering pan which is arranged to tilt orV rock about a horizontal axis, opposite ends of this pan being providedwith hollow trunnions 3--3, by

.which the pan is rotatably mounted in suitable trunnion bearings. t y

The pan 2 has abottom 5, sides 6,6, and

'ulltegrally.v formed ends `7, the hollow trunu ions S-3i eq'lenjnwbi into'theipan through' the end nel-ls otth i pair "At nniintenn'ediate point in thel height of the side wells of the pan is u series ofiperforetedgeate bars 8, these hars lieintgr held in position by transverse perl'oruted supports 8a.

(lirders l) which extend longitudilnilly :doucer eueh side of VVlalilre11min",-ei1f\i*ry vlengieil truuk rails 9a. forming a. track for charging ears :in d the; gas ignt'er.

The onterfemls dl the hllow'trunnions il are connected to one end of pipesll0--"1U, wh ieh ''forni (fondu its for leling the-gaseous products of Aeemlmstion from lbeneath the `girate bars RH in the pan *2, into the gas washers l l--lllto whichthe other endl ofthe pipes 1n-lil are eennected.

Pipes 1Q- P2 'wliiih derre "conneted to Vthe lower endsz (iT-'the Ivvti'slrers 'l1-l1, f'ferm `conduits gfor Heading the eleaned and cooled gaseous -prollue'ts 'di oo'ibuetien Yfrom Vthe YWashers to the inlet rm the exhaust `blower orfzm 13,"towlii`ehftlie lower end of Vthe ipes 12-'12 are eonneeted.

'Flic eirhanst Ifan. or'ljlower lll whieh` :is shown. has Vtwo inlets 114-14has a. single outlet whih is connectedby albi-anch pipe 15 'tofthellowerentl df 'a steel( lll, the steel; being o't snl'licient heigijht to Kearry Ioff the products of combustion discharged thereiuto by the exhaustion.

"l`he blower or fan 1P isjprovidel at its lower end with vu suitable trup i7. lmvinfhr ballles l5 -ai'mnged in 'frontfoentlexteud ing below 'the illkts lill-14 ofthe fan so as to compel the gaseous pro'durtsfol Veonibustion totrarelfaround them in xeiftortuous patlLtlereb'v musing any entraine'd Vwriter end sind@ 'tratfnray "be carried from `the washers 'l-l to `-l'lll or IHow by gravity into the pipe l119. which is conneetel to the lower end lfftlietrap `r1'?. The lower endof the pipe `1%) extends"downwardly into n set- 'tlinglunkfQQ whieh notmftllv islilled with waterto a point above thellower'endot the pipe lhand hes an oveilow 'Q1 at elV point above the lower end ol' the pipe l'{),t"herehy `forming u water seal `to p'r'eff'ent theseseape ol' gases from thelowve'r enll ol'lthe 'pipe 19 into the surroinrdi'n'g;r ertmosphere.

The washers llll emnprise en outer raising orwell E23. na-vino u removable top or head'Qi. `and a remoiV ilebottomorhezid niemliei-Bfi. 'llretop le is `l'i'rovide'd lwith :i venlrull)Y arranged 'inlet Q6. v'vflrirli extends downuurClly within the washer "for im appro viable distance. up, rendol the in vlet Zisirrovided will; ai ange E, eonneeted to n flange in the enl rfthe pies 1I0-l 01 le'dingi'from the ends 'of'thesintering pmi 2.

The bottom '25 is provided with *an inrl'ilre'd w'll and has aeentmllv arranged outlet29, which eentls iwarlilly Within tne'wns'll'er for an-nppree'fb ilitmrele The Willi 'Qf the 136i! @W59 U'W enl a,

`number of slots 29 therein. forming gus inlets. The conduit 28 is provided on its lower end with n flange 30. which connects with the flanged upper end oli the conduits or pipes l2.

Weiter is sprayed into the stremo ol' highlyr heated gaseous fluid or burned rases flowing Vtllrougfflrthe gras Washing' ehinnber by u series of radial nozzles 3l, these nozzles being urriing'ed in the ronduit pipes 10-1() arbore tho upper ends oi' Vthe washers ll. und tho buffles 32. 33 and 34 within the washer ciuse the said gases und wetter-"to travel through i1 toi-linens path. :ind eompels the leises lo pass. and \e1,\uss,'through the falling' rain ol waiter in the travel thereof.y through the washer.

The balli@ comprises u` vertical side 35. "and :m integral bottom 36. the bottoni'heing `conical and being` inclined toward the een- 'eer ot'this baille. (See Figure 3). small eentrully located outlet openinga 3T, in the bottom ib', has ai. dependiiigr tubulin portion W-and a` series of ribs S9 are formed on the inner surfaee of the side and bottoni of this 2 walh und converge toward the onilet opening,r il? in the tubular extension 3H. plurulit)T ol narrow radial slots l0 nre provided in the bottoni Bo through which a portion of the wuter und sludge falls.

'lille side nail 35 oi the lizxllle :i2 is spaced l'roni theiinlet conduit 1(3. bnl extends uliovo the lower edge of this Conduit.

Thelthird baille l-l. whirl is supported on the upper end ol' the outlet ronduit 29.0o1nprises a bottom Woll 4L which inelines to one side thereof. and the central portion oli the bottoni ll is projeeed upward in the forni ol a none. its apex or peel; l2 beine; 1oeeted slightly below the lower edge of the dependingl tubular extension HS on the baille 32. An integral rim portion fl-.9 extends around the iunior 'portion oi the bottom 4L being' eut uwny l'or :l spare along the lowerniost ll; 'eol's:1id bolionl 4l.

The second or iulerniedizite liullle lill is `supported on the lower lnillle sl und eoniprises '.1 tubular body 44. having :i llung'e l5 whirh extends outwurdl)Y und downwardly from the upper edge ot the body il. This flange is provided on its upper son l'm'e willi :l plllrulii)v olI rullini 1'il s'l1'i und Jthe llnngrr 15 is only ol' sutlif'ieul diunuler to lenire :i wry simili :innulnr openingr or spinne between the edge ol the flange und adjoining' side woll fil' lhe washer.

Suitable ii-ennuis or nimrholes :ire pro 'vided inthe side wells olI lhe washer. these openings bein;r rinsed h r rovers or houde 4R which, when removed. permit uri-ess (o the interior ol' the washer in looking ropuirs and in cleaningY the washer.

jA sludge pipe or drain i9 is ronneeted to 'anoutlet'etfthe.lowestpoint on'the bottom of the 'weif'slrer-7 thispipe etending downwardly into a settling tank ll), which normally conwater 1in, sniioienti quantity ,to provide a Waterseal iter` the end ntftjhepipe'.z

Inthe operation offmy L improved apparatus,` the,A gaseo usA `prod nets `ot Combustion are drawn from thel pri/11.2through the hollow tll-efsludgeheingf washed through the opening 3T and the series ofY slots .40, and through thereirtralopening innthe'hafile' to the lower baieahq ,'Ihelsludge-,fiformed oit' the liq'nely4 divided soliids `removedfrom the gases f by theimater iis Washed downthe sloping bottom. o-thefbaiile 34,'- and `falls into the thai gases ypassing,t!mron'gtr theopening` 37 f imp-inge. on thelm Welter ongthe bottom feti the fhafe 3.2, and?" aswell perdentage of and slots 4() with the Water and sludge.

. Howeviervthedirection off .trave-1 oi the major portion of. the gaseous products i of oombustion; will-he reversed, sof as tomove upwardly and overtheside wahl od the hadde 32, and

Ithen downwardly and around the-'lower end of the bal'lei, `and overithettpper edge .of baffle anch @anse ritt@ iimpinge onl vthe film oit,- watil on theqbottou oiirthe 'bahia 32, jthe ,f gasesbeingftherehy yfurthelfklooled, and. more '.Kbfttbefsolidimpua'ities,being removed. The

1 #gases then plt against] and over.V andaronnd thsabae Maand lpasstl-wouah nletzopenings 2,951 ,the yuralt' ofti'the upper" Gnd: 0f: the mondi-lit" 295 and ,passwthrough i hheioonduit 29 i into the pipes-m2# Contant, ofthewater Iwith the heated produetsfof? oomhustiontremoves iemiwashes, the rlnstiand other .finely divided solids ont of the gases, andalsohgneatly lowers the temperature of the. gases, and the baffles increase the` effectiveness of the Water by causingr the grises to impinge against the water on the surfaces of the baffles.

The sludge. which is formed by the water and solids removed from the gases, is Washed tlmvnvsardly and is drained from the bottom of the last baille 34, to the inclined bottom 25% of the washer. from ivliirh the sludge enters the drain pipe lil and passes into the settling tank 50.

ny sludge and water carried through [he washers by the rnoled gases are trapped in passing the haflies 19 in the trap 1T, and are thereby prevented from entering the blower or fan ifi, with the Cleaned and rooled waste gases.

The water and any slight amount of sludge. removed by the baies 18 of trap 17, pass downwardly through the pipe 19, into the settling tank 20, and overflows there from, through the overflow outlet on the tank 20, into the water seal 21.

The advantages of my improved apparatus willbe readily apparent to those skilled in the art. The life of the blower or fan will be greatly increased, since the gaseous products will not be laden with gritrand dust, to cause excessive wear on the bearings and other parts of the blower. The gaseous products of combustion will be cooled sufficiently to not warp or injure the fan or blower, and thereby increase the life of this part of the apparatus.

The dust and grit removed from the gases is collected in the form of sludge, and the waste gases passing out of the stack are in a comparatively clean state, do not destroy vegetation or injure surrounding property.

While I have described one form of ap- E paratns embodying my invention, it will he understood that the invention is not to be limited to such arrangement, but that various ehanges in design, in the construction yand arrangement of parts may be .made

,without departing from the spirit of my ini vention as defined in the appended claims.

I claim:-

1. In a `sintering plant the combination with a sintering pan, and an exhaust tan, and at least one Conduct connecting said siutering pan to said fan, of means oonneetod to said conduit between the sntering pau and exhaust fan for cooling and cleaning the products of Combustion Withdrawn from the pan by ysaid exhaustfan. 2. Inma sintering plant the combination withva sintering pan, an exhaustfan, ,and at least'one oonduit connecting said sinteringpan with said exhaust fan, of means oonnected to said conduit between saidsintering pani and the Aexhaust fan, adapted to Wash and cool the products of combustion withdrawnffrom the sintering pan by said exhaust Ufan. 'i

- 3i In'afsintering plant the combination with a sintering pan, an exhaust fan, and at least one Conduit connecting said sintering pan to said exhaust fan for drawing the products of combustion from said pan. of washing apparatus eonnerted to said enndnit between the sntering pan und the e hallSt fau. adapted io wash :Ind vuol said products of Combustion. means For spraying water into the prodnrts of combustion at the inlet to said washingr apparatus. and means within the washers for LansingT tlu {inids to traverse u tortuous path wil-hin said washers.

4. ln a sinloriug plant the rnuibinatiou oi' a sintering pan` aisnrtion fau, conduits non nesting said siutering pau to said fan, inlet ports for withdrawing burned gases from said pan, washing apparatus connected to said conduits between said pan and fan,

lil

@Qu-eines .iilipin-I to wash :unl r'ool said burned gases, saidpaAi-,fa'suetion fan, conduits Connecting miens for spi-:lying unter into the burned seidrunn'ionswith said fan, for withdrawn enses entering said washer,y und `means for ing thel'prednets of combustion from said renioviug entrziiueal water and sludge from ipanyep'amtors connected to said ooudults, the usishel gases. before the entrance thereof lptedto Wash and cool the i'noduots of ini s:iid exhuust tun. `dembus'ion LWiilldriifwn from the sintering Y. ln :i sintering plant the Combination of pan,1&nd` means for spraying Water into :i sinterinfg pun. u suction lian. conduits con- SadlprC-luets of combustion. before the en nei-ting sniil siutirinfl' pun to said suetion `fsm tranne thereof to said separators. for withdrawing the gaseous products of "8. In tti sintering plant the combination nomination from said sintering pan, means witla, Siri'teningpnn, a suction fau. conduits vonniwieil lo said wonduits between said pan 4\"obnnexiting said pen and seid fan. for withan l the inn. adapted to Wash and eool said dlrawing produets of combustion from said produits ni unnibnstion. und u trap in the'pmmdfmeansfor spraying Water into said lower portion oi' seid blower adapted to pl'otluets of Combustion, of separators noir separate eutr'nined freier `:1nd sludge from nested in Said conduits 'adapted to collect sziirl products of coinluiston, before the enfinely divided solids removed from said trance tbeieid' to said tan seid trap having fprnduetslof Combustion by the Winer. said bottle extending' in liront of and belofvthe Washers `coln'prisingr a easing having inlet inlet ports of said tan. n drain pipe Lfofr reend1`outlet openings`r e plurality of baffles reiving the separated sludge und waterfand 'Within' said Casing to dirent the flow of the :i settling' tnnlr forming a. water sealforsaid produets of Combustion through said easing, drain pipe. 'adrain pipeon Lthe lower end of said casing 6. ln :i sinteving plant the Combination `of' adapted gto 'drain the collected solids and a sinoring pun. u surtion tun. conduits Con#'Weter i7h'erefrom, 'and e settling tank havnei-tiun said sintering pan to seid fen, for `niggerWatersealed'eonneetion with the lower nitlidrnivingr the gaseous produetslof Com- Bndlofisid'drain pipe, bustion Vroni seid siuterinur pau.1nettns=eon `i9. 'Ifn a' Sintering plant the combination nected to .said conduits between said pan and with a sinterin pan, a suction fan, conduits Fun :ulnptiu to wash and Pool seid products `eofrine:ting ssiV pan to said fan` und means ot' combustion` menus 'for spraying W'ater fer-sptyingwuterinto the products of noniinto suiil produits ot combustion, means for lbustion,` Crt" un fimpinfgement washer vonnectpainting und volleeting the sludge and iedtosidieo'ndults between seid fan und seid unter Jroni sfiiil gases, :1 trap in"the lower pam daptedto rsefparatennd remove finely portion of sind lun adapted to separate endivided solids from the products o'f Cornbusl trained water and sludge `trom said rodtion,suid Washer comprising ay easing havnifts of roniluistion. before entra-nee o the ing gasinletimd outletopenings` a plurality gases to smid tun. snid trnp having bafles ex- 'of biesi'erranged within said casing to said tending in front of and belonr theinletports (o snol tan. :i drain pipeforreeeivingthe separated sludge und water. and a settling" tiinl: having a water sealed connection With` suiv! drain pipe.

T. In :i sintering plunt the combination with :i tilting sintering pan havingfhollow lrunnions :it its opposite ends opening into lgil'oduets'of combustion.y to impinge against t e' Writer covered bniiies, inthe travel there` "-ofthnghthe yWasher, and means for drain- 'ngthewllfeetions o't' finely divided solids 'and 'Weber :from sa id washer.

*ntestinony whereof. I have hereunto Bib ed *Infy name LOUIS (l. EDGAR. 

